Crash when requesting large entities from webserver

[kkneip]

When fetching large entity blob data from a model published to the webserver walkinside crashes.

The reasons seems to be that JSON serialization causes an error on server side. Event log states:

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 15.11.2017 11:02:18 
Event time (UTC): 15.11.2017 10:02:18 
Event ID: a8255d19a00d46c199238ce8daac9f72 
Event sequence: 12 
Event occurrence: 1 
Event detail code: 0 

Application information: 
    Application domain: /LM/W3SVC/1/ROOT/walkinsideservice-1-131552137288571050 
    Trust level: Full 
    Application Virtual Path: /walkinsideservice 
    Application Path: C:\Walkinside\wsmodels\ 
    Machine name: POLBES008 

Process information: 
    Process ID: 189160 
    Process name: w3wp.exe 
    Account name: KP07D0\polbesvc-walkinside 

Exception information: 
    Exception type: InvalidOperationException 
    Exception message: Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat)
   at Vrc.Wi.Services.JsonSerializer.serializeEntities2(IEnumerable`1 entities, StreamWriter writer) in e:\jenkins\workspace\walkinside-server-1.11-full-pipeline\server\wsmodels\contracts\JsonSerializer.cs:line 196
   at Vrc.Wi.Services.JsonSerializer.Serialize[T](T value, Stream out) in e:\jenkins\workspace\walkinside-server-1.11-full-pipeline\server\wsmodels\contracts\JsonSerializer.cs:line 39
   at CsConneg.Dispatcher.doDispatch(String acceptHeaderValue)
   at CsConneg.Dispatcher.doDispatch(String acceptHeaderValue)
   at Vrc.Wi.WsModels.ApiHandler.ProcessRequest(HttpContext context) in e:\jenkins\workspace\walkinside-server-1.11-full-pipeline\server\wsmodels\main\Api.ashx.cs:line 192
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Request information: 
    Request URL: http://polbes008.kp07d0.kp.thyssenkrupp.com/walkinsideservice/api.ashx?resource=entities 
    Request path: /walkinsideservice/api.ashx 
    User host address: 10.84.199.184 
    User: KP07D0\10513280 
    Is authenticated: True 
    Authentication Type: Negotiate 
    Thread account name: KP07D0\polbesvc-walkinside 

Thread information: 
    Thread ID: 9 
    Thread account name: KP07D0\polbesvc-walkinside 
    Is impersonating: False 
    Stack trace:    at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat)
   at Vrc.Wi.Services.JsonSerializer.serializeEntities2(IEnumerable`1 entities, StreamWriter writer) in e:\jenkins\workspace\walkinside-server-1.11-full-pipeline\server\wsmodels\contracts\JsonSerializer.cs:line 196
   at Vrc.Wi.Services.JsonSerializer.Serialize[T](T value, Stream out) in e:\jenkins\workspace\walkinside-server-1.11-full-pipeline\server\wsmodels\contracts\JsonSerializer.cs:line 39
   at CsConneg.Dispatcher.doDispatch(String acceptHeaderValue)
   at CsConneg.Dispatcher.doDispatch(String acceptHeaderValue)
   at Vrc.Wi.WsModels.ApiHandler.ProcessRequest(HttpContext context) in e:\jenkins\workspace\walkinside-server-1.11-full-pipeline\server\wsmodels\main\Api.ashx.cs:line 192
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Custom event details:

Any ideas how to handle this? Is there a possibility to increase maxJsonLength property? I tried this link (modifying web.config), but unfortunately it did not help.

Splitting the entity's data into multiple smaller packages is not appreciated.

Many thanks in advance and best regards,

Karsten

[kveretennicov]

This limit is not configurable at the moment, neither via SDK nor otherwise. You will need a fixed version of the product to work with large amount of entity data.

[gcorvala]

Hi @kkneip, we implemented a fix in the latest release. Feel free to reopen if you face again the same problem. Regards.